Which is not the synonym of barring（)？

A.GSM doesn't demand time syn

B.WCDMA network doesn't demand time syn

C.TD-CDMA network demands time syn

D.CDMA2000 demands time syn

E.

A.Trojan horse

B.Phreaking

C.Spoofing

D.SYN flood

A. zombie agents

B. SYN flood

C. IP packet fragments

D. WinNuke

A.Crack attack

B.Smurf attack

C.SYN flood

D.ICMP flood

A.SYN flood

B.Spam

C.Ping of death

D.Macro virus

A. a telnet to port 80

B. a TCP packet with the SYN and ACK flags set

C. an SNMP getnext request

D. an ICMP packet larger than 1024 bytes

A.Generating excessive broadcast packets.

B.Creating a high number of half-open connections.

C.Inserting repetitive Internet Relay Chat (IRC) messages.

D.A large number of Internet Control Message Protocol (ICMP) traces.

S attack is that an attacker sends an extensive amount of connection establishment (1)(e.g.TCP SYN requests) to establish hanging connections with the controller or a DPS. Such a way, the attacker can consume the network resources which should be available for legitimate users. In other (2), the attacker inserts a large amount of (3)packets to the data plane by spoofing all or part of the header fields with random values. These incoming packets will trigger table-misses and send lots of packet-in flow request messages to the network controller to saturate the controller resources. In some cases, an (4)who gains access to DPS can artificially generate lots of random packet-in flow request messages to saturate the control channel and the controller resources. Moreover, the lack of diversity among DPSs fuels fuels the fast propagation of such attacks.Legacy mobile backhaul devices are inherently protected against the propagation of attacks due to complex and vendor specific equipment. Moreover, legacy backhaul devices do not require frequent communication with core control devices in a manner similar to DPSs communicating with the centralized controller. These features minimize both the impact and propagation of DoS attacks. Moreover, the legacy backhaul devices are controlled as a joint effort of multiple network element. For instance, a single Long Term Evilution(LTE) eNodeB is connected up to 32 MMEs. Therefore, DoS/DDoS attack on a single core element will not terminate the entire operation of a backhaul device(5)the net work.

A.message B.information C.request D.date

A.methods B.cases C.hands D.sections

A.bad B.cases C.fake D.new

A.or B.administrator C.editor D.attacker

A.or B.of C.in D.to

A.——SYN/ACK——>，<——ack，——syn/ack——>

B.——SYN/ACK——>，<——syn/ack——，——ack——>

C.——SYN——>，<——ack，——syn——>，<——ack——

D.——syn——>，<——syn/ack——，——ack——>

A.SYN

B.FIN，ACK

C.SYN，ACK

D.RST